KR20090071458A - Radio communication apparatus and control method for radio communication system - Google Patents

Abstract

A control method in a wireless communication system and a wireless communication apparatus are provided to suppress the transmission of a wireless resource allocation request signal and wireless resource selection signal. In case a signal is received from the second wireless communication device, a controller(10) controls so as to restrict the transmission of a signal used for the selection of a wireless resource to be allocated. A transmitting unit(14-18) transmits the signal to the first wireless communications device.

Description

CONTROL METHOD AND RADIO COMMUNICATION DEVICE IN RADIO COMMUNICATION SYSTEM {RADIO COMMUNICATION APPARATUS AND CONTROL METHOD FOR RADIO COMMUNICATION SYSTEM}

The present invention relates to a wireless communication device for performing wireless communication and a control method thereof. The present invention is preferably used in a mobile communication system including a radio communication device which transmits a radio resource allocation request and receives radio resource allocation to transmit data.

Various communication methods using wireless communication as a communication means are known.

Here, Long Term Evolution (LTE) will be described as an example of a wireless communication system that performs wireless communication.

1 is a diagram for explaining the flow of processing from a mobile station as an example of a radio communication apparatus to data transmission (uplink transmission) to a base station as an example of the radio communication apparatus.

When communicating with a base station, the mobile station first transmits a random access signal in a transmission area shared with other mobile stations. When the base station receives the random access signal, the base station transmits a response signal to the mobile station, establishes uplink synchronization, and receives a scheduling request signal (SR) for requesting allocation of radio resources and the possibility of receiving the allocation. Allocates a radio resource to a mobile station for transmitting a pilot signal (SRS: Sounding Reference Signal) transmitted over a wide band (wide band) in a predetermined frequency band. If the radio resource for transmitting the scheduling request signal has already been allocated, the above processing may be omitted.

By the way, when the mobile station allocated the radio resource for transmitting the scheduling request generates data to be transmitted (arrives the data processing unit), the mobile station transmits the scheduling request signal SR to the base station as shown in the figure. Upon reception of the SR, the base station determines (selects) an uplink radio resource allocated to the mobile station and informs the mobile station of the selected radio resource (frequency, etc.) allocation information (UL allocation grant). To the mobile station. Therefore, the mobile station transmits the transmission data generated (arrived) using the uplink resource specified by the informed radio resource information.

Since the mobile station is also allocated a radio resource for transmitting the SRS, the radio station transmits the SRS using the radio resource, and the base station observes the reception state of the SRS, so that the radio resource to be allocated to the mobile station is determined. In order to know if the frequency part is preferable, a radio resource corresponding to the frequency part having the best reception quality or the like is allocated to this mobile station.

By the way, when uplink data is transmitted from the mobile station, the base station transmits the reception result information (ACK / NACK). Here, ACK indicates that the data could be received normally (without error), and NACK indicates that the data could not be received normally (without error) (that there was an error).

When transmitting the NACK, an uplink radio resource for retransmission can be newly allocated to the mobile station. When transmitting an ACK, an uplink radio resource for the next new transmission can be allocated to the mobile station.

Therefore, when the mobile station receives the ACK, the mobile station transmits using the radio resource allocated with the new data. When the mobile station receives the NACK, the mobile station transmits using the radio resource allocated with the retransmission data.

In addition, when transmitting the uplink data, the reception result information (ACK / NACK) for downlink data reception may be multiplexed with the uplink data and transmitted separately from the uplink data.

For example, when there is no uplink data, reception result information may be transmitted on an uplink control channel (PUCCH), or when there is uplink data, radio resource allocation information (UL allocation grant). By using the radio resources allocated in the above, the data and the reception result information may be transmitted in multiple times.

As described above, the transmission of the uplink has been described. Hereinafter, the transmission of the downlink will be described with reference to FIG. 2.

2 is a diagram for explaining the flow of processing for data transmission (downlink transmission) from the base station to the mobile station.

As shown in the figure, when there is downlink data to be transmitted, the base station firstly includes a control signal (downlink expression, coding rate, etc.) of radio resources and transmission format for transmitting downlink data to the mobile station as a destination thereof (downward). Scheduling information) is transmitted on a downlink control channel (PDCCH). Although there exist a plurality of downlink control channels, the mobile station receives each control channel and determines whether there is a control signal in front of the own station. For example, a determination is made based on whether or not ID information of the mobile station is included. When the control information directed to the own station is detected, the downlink data channel (PDSHC: Physical Downlink Shared Channel) is received based on the allocation information and the transmission format information of the radio resource included in the control signal to acquire the downlink data.

When the downlink data can be decoded correctly, the ACK signal is transmitted. If the downlink data cannot be decoded correctly, the NACK signal is transmitted to the base station. When the base station receives the ACK signal, it transmits new data next, and when receiving the NACK signal, it transmits retransmission data next.

In addition, since the mobile station also observes the transmission quality of the downlink channel, the mobile station transmits the observation result as channel quality information (CQI: Channel Quality Indicator) to the base station.

When the base station receives the CQI, the base station performs radio resource selection, transmission format selection, and the like so that the reception quality is good at the mobile station.

The technique related to the LTE is described in detail in Non-Patent Documents 1 and 2.

[Non-Patent Document 1] 3GPP TS36.300

[Non-Patent Document 2] 3GPP TS36.211

As in the uplink data transmission described above, one radio communication device requests allocation of radio resources for transmitting data to the other radio communication device, and the other radio communication device responds thereto. Smooth transmission control can be performed by following the procedure for allocating a radio resource.

However, although the radio resource allocation request has been received, there may be a case where there is no radio resource to be allocated. In addition, such a period may be continued.

In such a case, one radio communication device cannot allocate radio resources even if it transmits a signal requesting the assignment of radio resources (it becomes a silent state with no response from the base station). Transmitting the required signal may result in unnecessary traffic pressure, exhaustion of the battery of the mobile station, and unnecessary interference increase.

This can happen in LTE as described above.

3 shows a flow of uplink resource allocation and data transmission in LTE. In this example, the mobile station periodically transmits the SRS and transmits the SR by generation (arrival) of an uplink data packet. However, the base station cannot allocate radio resources and is in a silent state. Therefore, the mobile station repeats the periodic transmission of the SRS, and repeatedly transmits the SR, and only the third SR is received at the base station. The base station allocates an uplink radio resource for transmitting a buffer status report (BSR) signal to the mobile station.

The base station adjusts the width of the frequency band of the uplink radio resource allocated for uplink data transmission according to the data amount indicated by the BSR, notifies the mobile station of the allocated radio resource, and the mobile station informs the allocated radio resource. Data is transmitted.

As described above, even in LTE, since radio resources cannot be allocated, it is clear that a signal for requesting allocation of radio resources is transmitted again.

In particular, such a problem will be more prominent in a base station corresponding to a femtocell with a small allocation of radio resources.

Accordingly, an object of the present invention is to enable transmission of a signal requesting allocation of radio resources to be suppressed.

In addition, an object of the present invention is to enable transmission of a signal used to select a radio resource.

In the present invention, the first radio communication device transmits a signal used to select radio resources to the second radio communication device, and the second radio communication device requests allocation of radio resources from the first radio communication device. Upon receiving a signal to transmit, based on the signal used to select the radio resource, the radio resource to be allocated is selected from within a predetermined frequency band, and the information of the selected radio resource is transmitted to the first radio communication device, In a control method in a wireless communication system, the first wireless communication device transmits transmission data using a wireless resource specified by the information of the wireless resource, wherein the first wireless communication device is the second wireless communication. In the case of receiving a predetermined signal from the device, controlling to control the transmission of the signal used for the selection of the allocated radio resource; A control method is used.

Preferably, the signal used for selecting the radio resource is either a pilot signal transmitted using a plurality of frequencies within the predetermined frequency band or a signal indicating a buffer state in the first radio communication device. .

Preferably, the second radio communication device transmits the predetermined signal based on the reception of the signal requesting the allocation of the radio resource.

Preferably, the second radio communication device transmits the predetermined signal as notification information.

Preferably, the predetermined signal is a signal transmitted in a situation in which radio resource allocation cannot be performed, and the first radio communication device is configured to notify a signal indicating that the radio resource allocation is possible. 2 When canceled from the wireless communication device, the regulation is released.

Preferably, the predetermined signal is a signal transmitted in a situation in which radio resource allocation cannot be performed, and includes an expected timing at which the situation in which the radio resource allocation cannot be performed changes. The communication device releases the restriction upon receiving notification information indicating that the radio resource can be allocated from the second wireless communication device at the expected timing.

Preferably, the signal used for selecting the radio resource is a pilot signal transmitted using a plurality of frequencies within the predetermined frequency band, and the first radio communication device is a predetermined signal from the second radio communication device. When the signal is received, control is performed to restrict the transmission of the signal for requesting the allocation of the radio resource, and the regulation of the transmission of the pilot signal is based on the restriction of the transmission of the signal for requesting the allocation of the radio resource. At the same time, or earlier than that, or at the same time as the transmission of the report signal of the buffer amount, or before that time.

In the present invention, the first radio communication device transmits a signal used for selecting radio resources to the second radio communication device, and the second radio communication device allocates radio resources from the first radio communication device. When receiving a signal for requesting, the radio resource to be allocated is selected from within a predetermined frequency band based on the signal used for the radio resource selection, and the information of the selected radio resource is transmitted to the first radio communication device. The wireless communication apparatus corresponding to the first wireless communication apparatus in the wireless communication system, wherein the first wireless communication apparatus transmits transmission data using a wireless resource specified by the information of the wireless resource. 2 Control to restrict transmission of a signal used for selection of the radio resource to be allocated when a predetermined signal is received from the radio communication apparatus. It utilizes a radio communication apparatus comprising the controller performed.

Further, in the present invention, the first radio communication device transmits a signal used for selecting radio resources to the second radio communication device, and the second radio communication device is configured to transmit radio resources from the first radio communication device. When receiving a signal requesting assignment, based on the signal used for the selection of the radio resource, the radio resource to be allocated is selected from within a predetermined frequency band, and the information of the selected radio resource is transmitted to the first radio communication device. In the radio communication apparatus corresponding to the second radio communication apparatus in the radio communication system, the first radio communication apparatus transmits transmission data using a radio resource specified by the radio resource information. And a transmitting unit for transmitting a predetermined signal to the first wireless communication device, wherein the first wireless communication device is configured to perform the predetermined signal. The radio communication apparatus characterized by not receiving a signal used for the selection of the radio resource to be allocated from the first radio communication apparatus while controlling to restrict the transmission of the signal used for the radio resource selection to be performed. Use

Further, in the present invention, the first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device transmits the radio resource from the first radio communication device. Upon receiving a signal requesting assignment, a radio resource to be allocated is selected, information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication device is specified by the information of the radio resource. In a control method in a wireless communication system for transmitting transmission data using a radio resource, the second radio communication device transmits a predetermined signal in accordance with a radio resource allocation situation, and the first radio communication device includes: When a predetermined signal is received from the second radio communication device, controlling to restrict transmission of a signal requesting allocation of the radio resource; It utilizes a control method according to claim.

Preferably, the second radio communication device transmits the predetermined signal when there is no radio resource that can be newly allocated.

Preferably, the regulation is performed up to a time limit determined based on any one time included in a single or a plurality of time candidates.

Preferably, the predetermined signal includes timing information for releasing the regulation, and the second radio communication device releases the regulation in accordance with the timing information.

Preferably, the second radio communication apparatus transmits the predetermined signal on the basis of receiving either a random access signal or a scheduling request signal.

Preferably, the signal for requesting allocation of the radio resource is either a random access signal or a scheduling request signal.

Further, in the present invention, the first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device transmits the radio resource from the first radio communication device. Upon receiving a signal requesting assignment, a radio resource to be allocated is selected, information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication device is specified by the information of the radio resource. In a radio communication apparatus corresponding to the first radio communication apparatus in a radio communication system that transmits transmission data using radio resources, a predetermined signal transmitted from the second radio communication apparatus in accordance with the radio resource allocation situation. A receiving unit for receiving and a signal for requesting allocation of the radio resource when the predetermined signal is received by the receiving unit. Utilizes a radio communication apparatus comprising the control unit performs control to.

Further, in the present invention, the first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device transmits the radio resource from the first radio communication device. Upon receiving a signal requesting assignment, a radio resource to be allocated is selected, information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication device is specified by the information of the radio resource. In a radio communication apparatus corresponding to the second radio communication apparatus in the radio communication system that transmits transmission data using radio resources, a transmitter for transmitting a predetermined signal in accordance with the radio resource allocation situation, and the predetermined signal. The first wireless communication device that has received the control signal to the wireless communication device while regulating a signal for requesting allocation of the wireless resource. And a signal for requesting allocation of the radio resource from the radio communication device.

According to the present invention, transmission of a signal requesting allocation of radio resources can be suppressed.

In addition, the present invention can suppress transmission of a signal used for selecting a radio resource.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated.

In this embodiment, the first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device requests radio resource allocation from the first radio communication device. Upon receiving the signal, the radio resource to be allocated is selected, and the information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication device uses the radio resource specified by the radio resource information to transmit data. In a control method in a wireless communication system, the second wireless communication device transmits a predetermined signal in accordance with a radio resource allocation situation, and the first wireless communication device transmits a predetermined signal from the second wireless communication device. In the case of receiving a signal, it is assumed that control is performed to restrict transmission of a signal requesting allocation of radio resources.

Therefore, by transmitting this predetermined signal, it is possible to restrict the transmission of a signal requesting allocation of radio resources. In addition, traffic pressure and the like can be avoided.

Hereinafter, the above-described LTE will be described as an example of a wireless communication system that enables the transmission of data by allocating a radio resource in accordance with a radio resource allocation request. Of course, the same processing can be executed by including the function of transmitting a predetermined signal in other wireless communication systems. When applying to another system, what is necessary is just to change the processing method of a transmission processing part and a reception processing part accordingly.

In addition, in LTE, uplink is configured according to SC-FDMA (Single Carrier Frequency Division Multiple Access) and downlink is used to transmit and receive radio signals using Orthogonal Frequency Division Multiple Access (OFDMA).

"Configuration of the wireless communication device (base station 1)"

4 shows a configuration of a base station 1 as an example of a wireless communication device.

In the figure, reference numeral 10 denotes a control unit that controls each unit, and acquires information (control information, etc.) received from the mobile station 2 as an example of the radio communication apparatus by the reception processing units 20 to 26, A control signal (notification information, individual control information) is generated and supplied to the transmission processing units 14 to 18, thereby transmitting to the mobile station 2. Representative examples of the generated control signal include a predetermined signal (for example, zero allocation information, back off time), allocation information of the selected radio resource (UL allocation grant), reception result information (ACK / NACK), and the like. .

Reference numeral 11 denotes a data processing unit and supplies data to the scheduler 12 in front of a plurality of mobile stations including the mobile station 2 supplied from an upper side of the connected mobile network. Reference numeral 12 denotes a scheduler, which controls the order in which data for each mobile station is transmitted, determines a transmission schedule, and transmits the transmission data to the multiplex 13 so that the data to each mobile station is transmitted according to the determined schedule. Supply. In addition, the transmission data is preferably subjected to error correction coding (turbo coding or the like) in advance.

Scheduling can be performed using various parameters such as CQI information reported from the mobile station and QOS.

Reference numeral 13 denotes a multiple part, and the control information generated by the control unit 10 (including a predetermined signal to be described later) and data are multiplexed and supplied to the symbol mapping unit 14.

Reference numeral 14 denotes a symbol mapping unit, and maps data and control signals to predetermined signal points. The multiplexer 15 multiplexes the signal subjected to the mapping process and the pilot signal used by the mobile station 2 to measure the CQI, and the like, and supplies the multiplexer 15 to the IFFT processor 16 as a signal corresponding to a plurality of subcarriers.

The Inverse Fast Fourier Transformation (IFFT) processing unit 16 performs a conversion process from the frequency domain to the time domain on the signal corresponding to each subcarrier, and outputs a transmission signal.

The CP (Cyclic Prefix) inserting unit 17 copies a part of the rear part of the symbol to the head of the symbol for the transmission signal, forms a so-called Guard Interval (GI), and supplies it to the radio processing unit 18.

Reference numeral 18 denotes a wireless processing unit, which performs frequency conversion processing (up-converting), amplification processing, and the like necessary for wireless transmission, and transmits a radio signal from the antenna via the DUP 19 serving as a handset. In addition, a plurality of antennas may be provided to correspond to Multi Input Multi 0utput, or may correspond to an array antenna for adjusting the beam direction by weighting control.

On the other hand, the signal received from the antenna is supplied to the radio processor 20.

Reference numeral 20 denotes a radio processing unit, performs unnecessary wave elimination, amplification processing, and the like on the received signal and sends it to the CP deleting unit 21.

Reference numeral 21 denotes a CP deletion unit, and removes the CP added by the mobile station 2 and supplies it to the FFT processing unit 22, and the FFT (Fast Fourier Transformation) processing unit 22 frequency-receives the received time domain signal. The signal is converted into an area signal, and the equalization processing unit (equalizer) 23 performs an equalization process to correct the distortion and supply it to the IFFT processing unit.

Reference numeral 24 denotes an IFFT processor, which converts a signal in the frequency domain into a signal in the time domain and supplies it to the demodulator 25.

Reference numeral 25 denotes a demodulator, demodulates a received signal and supplies it to a decoder, and decoder 26 performs a decoding process (e.g., error correction decoding processing such as turbo decoding) on the demodulated signal. , Outputs the decoding result. In addition, data is transmitted to the mobile network side, and a control signal is supplied to the control unit 10. Examples of representative control signals supplied to the control unit 10 include signals for requesting the allocation of radio resources (eg, SR), signals used for assignment of radio resources (eg, SRS, BSR), and reception result information. (ACK / NACK), reception quality information (CQI), and the like.

Reference numeral 27 denotes a channel quality measuring unit, measures the reception quality with respect to the received signal received by the wireless processing unit 20, and supplies the measurement result to the scheduler 12.

Next, the structure of the mobile station 2 is demonstrated as an example of a wireless communication apparatus using FIG.

"Configuration of the wireless communication device (mobile station 2)"

5 shows a configuration of a mobile station 2 as an example of a wireless communication device.

In the figure, reference numeral 30 denotes a control unit that controls each unit, and acquires information (control information, etc.) received from the base station 1 as an example of the radio communication apparatus by the reception processing units 41 to 45, The control signal (individual control information) is generated and supplied to the transmission processing units 33 to 38 to transmit the control signal to the base station 1. As a representative example of the generated control signal, a signal (for example, SR) requesting radio resource allocation, a signal (for example, BSR) used for allocation of radio resource, reception result information (ACK / NACK), reception Quality information (CQI); It is also possible to perform error correction encoding processing on the control signal.

Reference numeral 31 denotes a data processing unit, and supplies information input from an input unit (not shown), data generated inside the apparatus, or the like to the multiple unit 32. The data is preferably subjected to error correction encoding processing such as turbo encoding.

Reference numeral 32 denotes a multiple part, and the control signal supplied from the control unit 30 and the data from the data processing unit are multiplexed and supplied to the symbol mapping unit 33.

Reference numeral 33 denotes a symbol mapping unit, and maps data and control signals to predetermined signal points. The multiplexer 34 multiplexes the signal subjected to the mapping process and a pilot signal such as an SRS (which can be interpreted as a kind of control signal) and supplies it to the FFT processing unit 35.

Reference numeral 35 denotes an FFT processor, and converts the input signal into a signal in the frequency domain from a signal in the time domain and supplies the output to the frequency mapping unit 36.

Reference numeral 36 denotes a frequency mapping unit, and frequency mapping is performed so as to be arranged in a predetermined radio resource (frequency band) allocated to the base station 1.

Reference numeral 37 denotes an IFFT processing unit, which converts a frequency-mapped signal into a signal in the time domain, and supplies the same to the CP insertion unit 38, which, like the base station 1, inserts a CP. To supply the transmission signal to the wireless processing unit 39.

Reference numeral 39 denotes a radio processing unit, performs necessary up-converting, amplification processing, and the like on the supplied transmission signal, and transmits it as a radio signal from the antenna via the DUP 40 serving as a handset.

In this way, the mobile station 2 transmits a radio signal corresponding to the SC-FDMA system.

On the other hand, the received signal from the base station 1 received by the antenna is supplied to the radio processor 41 via the DUP 40.

Reference numeral 41 applies a reception signal to the CP deleting unit 42 after performing unnecessary waves, amplification processing, and the like on the received signal.

Reference numeral 42 denotes a CP deletion unit, deletes a CP in the received signal, and supplies it to the FFT processing unit 43.

Reference numeral 43 denotes an FFT processing unit which converts the received signal of the CP removed into a signal in the frequency domain and outputs it.

Reference numeral 44 denotes a demodulator, demodulates a signal corresponding to each subcarrier from the FFT processor 43, and supplies a demodulated signal to the decoder 45. FIG.

The decoding unit 45 performs error correction decoding processing such as turbo encoding on the demodulation signal, and supplies data to an output unit (not shown) or to the data processing unit 31.

On the other hand, the control signal is supplied from the decoding unit 45 to the control unit 30.

Here, as a representative example of the control signal, a predetermined signal (for example, zero allocation information, back off time), allocation information (UL (Up-link) allocation grant) of the selected radio resource, reception result information (ACK / NACK) ), And the like.

Next, the wireless communication performed between the base station 1 and the mobile station 2 will be described with reference to FIG. 6.

・ "Flow of processing (part 1)"

6 shows a flow of resource allocation and data transmission on the uplink (part 1).

In this example, it is assumed that the mobile station 2 is in a state capable of transmitting an uplink control signal to the base station 1. For example, the mobile station 2 establishes uplink synchronization with the base station 1 by transmitting a random access signal, and transmits various control signals by the base station 2 using the designated uplink channel. It is assumed that the data can be transmitted.

By the way, the mobile station 2 transmits the SRS signal through the uplink channel. The SRS signal is a signal used when the base station 2 allocates an uplink radio resource. For example, the SRS can be a known pilot signal transmitted using a plurality of frequencies among predetermined bands (B: bandwidth = BW1) that the base station 2 may allocate. The wider this signal is in the predetermined band B, the wider it is, which helps the base station 2 in selecting radio resources.

In this example, although the mobile station 2 transmits the SRS periodically at a predetermined cycle, the mobile station 2 can be limited to the SR (simultaneous) and transmit it at the same time. Can also be transmitted in advance.

By the way, although the mobile station 2 transmits SRS periodically as shown in the figure, when the uplink packet data has occurred (arrived) in the data processing unit 31, the control unit 30 generates an SR, and the multi-unit 32 ), The SR is transmitted to the base station 1.

7 shows a structural example of a frame used for uplink transmission.

For example, a radio frame having a length of 10 ms is set as one radio frame, and one radio frame is divided into 20 0.5 ms slots to configure one sub frame with two slots.

PUCCHi and PUCCHj each represent two uplink control channels, and frequency hops are generated at the borders of the slots in the middle of the 1ms subframe.

The mobile station 2 is assigned from the base station 1 either one of PUCCHi and PUCCHj as an uplink control channel.

For example, when the mobile station 2 has been assigned the PUCCHj, the mobile station 2 transmits the SR using the PUCCHj. The SR includes a signal for which the mobile station 2 requests allocation of a radio resource for transmitting uplink data.

In addition, SRS can transmit using the radio resource of the part contained in the dotted line frame (for example, one symbol from the head of a radio subframe) shown by A of a figure, for example. In this case, the SRS signal may be transmitted over the entire predetermined frequency band, but may be divided into a plurality of frequencies according to a predetermined rule and transmitted. The transmission may be performed except for the frequency used for transmission of the PUCCH.

In the case of transmitting the SRS simultaneously with the PUCCH, the start timing of the PUCCH of the first half slot is kept backward, so that the length of the PUCCH of the first half slot can be shortened and the data of the duplicate part can be prevented from being transmitted.

By the way, the reception processing unit of the base station 1 receives the SR transmitted from the mobile station 2, performs decoding processing as necessary, and supplies the control unit 10 with data included in the SR. When the base station 1 receives the SRS, the channel quality measuring unit 27 for measuring the channel quality specifies which frequency band has a relatively good reception within a predetermined frequency band, and the scheduler 12 Notice).

Upon reception of the SR, the control unit 10 recognizes that the mobile station 2 requests the allocation of the uplink radio resource, and executes the radio resource allocation process.

However, in this case, the control unit 10 indicates that it is difficult to allocate radio resources to the mobile station 2, such as when the uplink radio resources are already allocated to all other mobile stations. If so, a predetermined signal is generated, supplied to the multiplexing unit 13, and transmitted to the mobile station 2.

The predetermined signal is a signal in which the mobile station 2 can perform a predetermined operation by detecting the predetermined signal.

In this case, it is assumed that the radio resources cannot be allocated (the purpose of allocating zero radio resources) is the content of the predetermined signal.

8 shows a structural example of a frame used for downlink transmission.

Similar to the uplink, two slots of 0.5ms constitute a subframe of 1ms. In the first part of the first half slot, a transmission area of a control channel (for example, PDCCH) indicated by a dotted line B is set. Here, five control channels i, j, k, 1 and m are shown. In the figure, although the control channel is formed in the area | region hardened in frequency, it can also distribute so that it may not overlap each with a predetermined rule. In each control channel, identification information (ID) of the mobile station 2 can be included. For example, the ID of the mobile station 2 may be included in the control signal, the ID may be multiplied by the control signal, or the like.

The control channel can transmit a predetermined signal (for example, a signal indicating that radio resources cannot be allocated) if there is enough capacity to contain a message in the control channel. In addition, the control channel includes information designating a corresponding data channel (any one of i, j, k, 1, m) among the shared data channels (for example, PDSCH) indicated by dotted lines C. FIG.

For example, the control channel i includes frequency information and transmission parameters (modulation method, encoding rate, etc.) used for transmission of the data channel i, so that the mobile station 2 receives the data channel by receiving the control channel i. makes it possible to receive the data transmitted in i.

Thus, for example, when the base station 2 transmits a predetermined signal to the mobile station 2 and uses the data channel i, the base station 2 transmits a control signal including the ID of the mobile station 2 and the predetermined signal. In addition to transmitting in the control channel i, information capable of specifying the data channel i (frequency information, etc.) is transmitted in the control channel i.

In addition, although the arrangement order of a control channel and a data channel is matched in the figure, the order may not be made same.

By the way, when a predetermined signal is transmitted from the base station 1, the mobile station 2 receives the predetermined signal in the reception processing unit and supplies the received signal to the control unit 30.

Since the control part 30 detected that the predetermined signal was received from the base station 1, it performs a predetermined | prescribed operation.

That is, the transmission of the (SR) signal for requesting allocation of radio resources is regulated.

Normally, even though the SR, which is a radio resource allocation request, has been transmitted, since the radio resource allocation has not been received from the base station 1, the control for transmitting the SR is repeatedly executed, but by receiving a predetermined signal, It regulates the transmission of the SR.

In addition, the SRS is a separate signal used for a purpose different from the SR, but the control unit 30 of the mobile station 2 restricts the transmission of the SRS upon receiving a predetermined signal. Therefore, the base station 1 does not have to receive the SRS and perform the observation and analysis.

In this example, transmission of the SRS transmitted at a predetermined cycle is regulated. In the drawing, since the second SRS has already been transmitted when the predetermined signal is received, the control unit 30 then restricts the transmission of the SRS.

As described above, it is also possible to suppress the unnecessary transmission of the SR. In addition, in the SRS, the base station 1 has a mobile station 2 in a predetermined frequency band (BW (width = BW1)) with respect to the mobile station 2. Although it is a signal of a different purpose from SR, which is used to select a frequency to be allocated to), transmission of the SRS can be suppressed by transmission of this predetermined signal.

By the way, by the transmission of a predetermined signal, regulation control is executed in the mobile station 2, but in this embodiment, a structure for releasing regulation is introduced.

・ Cancellation of Regulations

The control unit 30 of the mobile station 2 regulates the transmission of the SR by receiving a predetermined signal or executes the regulation control for regulating the transmission of the SRS, but may also release the regulation by the time clock using the internal timer. For example, upon receiving a predetermined signal, the predetermined time T is set in the timer, and upon receiving notification of the elapse of time T from the timer, the regulation is canceled and the SR or SRS transmission is canceled. Preferably, the release of the transmission restriction of the SRS is performed before the SR. It can also be released at the same time as the SR. This is because if the base station 1 receives the SRS simultaneously or in advance with the SR when allocating the radio resources according to the SR, the base station 1 can execute the assignment reflecting the situation of radio quality. In addition, when the SRS is received by the base station 1 in the nearer time when the radio resource is allocated, the base station 1 is preferable because the base station 1 can reflect the more recent radio quality situation in the allocation.

Although T is a single value, one selected from a plurality of different predetermined time candidates T0 to TN (N is a value of 2 or more) may be set as a predetermined time in a timer. Although the selection algorithm is considered various, the mobile station generates a random number, so that the timer corresponding to the remaining i divided by the random number divided by N + 1, Ti (i is 0 or more and N or less) as a predetermined time, so as to be distributed among the mobile stations. You may set in.

In addition, the regulation may be released by the arrival of a predetermined time. For example, a number is assigned to each radio frame, and when a predetermined radio frame arrives, the control unit 30 may release the restriction.

In addition, the control unit 30 may obtain timing information for releasing the regulation from the base station 1 and release the regulation according to the timing information.

For example, the control unit 10 of the base station 1 generates a predetermined signal including the back off time, and transmits it to the transmission processing unit (transmission on the control channel PDCCH or data channel PDSCH).

Then, the control unit 30 of the mobile station 2 extracts the back off time, executes the regulation over the time defined by the back off time Tb, and then releases the regulation.

For example, as shown in FIG. 6, the transmission timing of SR is made into a calculation timing, and the time regulation designated by Tb is performed. The calculation timing may be another timing such as the reception of a predetermined signal.

The mobile station 2, which detects that the deregulation condition is satisfied, executes the transmission of the SR in order to request the allocation of radio resources again, since there is still an uplink data packet to transmit.

In this example, the SRS is transmitted from the mobile station 2 prior to the SR.

Upon reception of the SR, the control unit 10 of the base station 1 checks whether or not a situation in which a radio resource can be allocated is reached by the passage of the regulation time, and detects that the radio resource can be allocated. In order to determine how much band is required for allocation of data transmission, a signal for allocating a radio resource for transmission of the buffer status report (BSR) signal is generated and transmitted to the transmission processing section. At this time, since the SRS is received from the mobile station 2, the frequency of the radio resource to be allocated can also be set to a frequency portion showing good reception quality by the SRS.

The mobile station 2 obtains a buffer amount from the data processing unit 31, which also serves as a buffer unit for storing data to be transmitted, and reports the buffer amount (transmission of BSR) to the base station 1 using the allocated radio resource. .

The control unit 10 of the base station 1 selects the required frequency bandwidth and the frequency portion by using the BSR and the SRS (latest SRS or integrated SRS), and uses the mobile station as the information of the radio resource for data transmission. 2).

Therefore, the mobile station 2 transmits data in accordance with the information of the selected radio resource.

9 shows the configuration (in the case of transmission data) of a radio frame used for uplink transmission.

As shown in FIG. 7, data is transmitted using a radio resource (PUSCH) designated to the base station 1 using a radio subframe including two slots. In addition, when the mobile station 2 is receiving downlink data from the base station 1, the mobile station 2 may transmit a reception result (ACK / NACK) or a CQI by time multiplexing the data portion. The radio resource information indicates radio resources (frequency, etc.) for transmission such as DATA.

In the above-described example, the SRS transmission restriction is released prior to the SR. However, the transmission restriction of the SRS may be released prior to the transmission of the BSR and the transmission of the BSR. This may be difficult to use for selecting a radio resource for transmission of the BSR, but may be used for selecting a radio resource for data transmission.

In addition, although SR, BSR, and SRS were transmitted separately, it can also transmit simultaneously.

When the SR is transmitted but the predetermined signal is not transmitted from the base station 1 (in the case of the silent), the mobile station 2 transmits the SR again without restricting transmission of the SR or the like. do.

In addition, after the SR transmission, the data is transmitted after the BSR is transmitted, but the data may be transmitted using the radio resource allocated to the SR. For example, the step of transmitting the BSR is omitted, or the data and the BSR are multiplexed and transmitted.

・ "Flow of processing (the 2)"

10 shows a flow of resource allocation and data transmission on the uplink (Part 2).

In FIG. 6, the base station 1 transmits a predetermined signal in response to the reception of the SR, but here, transmits a predetermined signal in response to the reception of the BSR. The other processing can be basically performed similarly to the flow of data transmission (part 1).

That is, when the control unit 10 of the base station 1 receives the first SR from the mobile station 2, it determines whether the allocation of the radio resource for transmitting the BSR is possible, and if it is determined to be possible, the radio resource for the BSR transmission. Is assigned to the mobile station 2, and the allocated radio resource information is transmitted via the control channel (PDCCH) or data channel (PDSCH) of FIG.

The control unit 30 of the mobile station 2 detects the information of the allocated radio resource and transmits the BSR using the radio resource, but the control unit 10 of the base station 1 secures the band corresponding to the BSR. I think it is difficult to do. The case where the situation changed from the reception of the SR or the BSR transmitted by the mobile station 2 indicates that the amount of data to be transmitted is large, and the case where it is difficult to secure a band suitable for the amount of data or the amount of data to be transmitted has priority over other mobile stations. For example, there is a case of waiting for transmission for a while.

In any case, in this case, the base station 1 transmits a predetermined signal because it is difficult to allocate the radio resource for data transmission to the mobile station 2. The predetermined signal can be the predetermined signal shown above.

Then, the control unit 30 of the mobile station 2 performs the above-described regulation control by receiving a predetermined signal, and performs the same processing by the above-mentioned release.

・ "Flow of processing (part 3)"

11 shows the flow of resource allocation and data transmission on the uplink (part 3).

In FIG. 6, although the mobile station 2 has not transmitted data, it is assumed that the mobile station 2 has already transmitted data in this example. In addition, it is assumed that the buffer state is properly reported to the base station 1 by multiplexing the BSR with the data. The other processing can be basically performed similarly to the flow of data transmission (part 1).

By the way, the mobile station 2 periodically transmits the SRS, multiplexes the BSR to the data, and transmits the multiple data using the radio resource allocated to the base station 1.

That is, in the frame shown in Fig. 9, the BSR is multiplexed in the area indicated by DATA, or the BSR is stored and transmitted in the area indicated by ACK / NACK or the like.

The control unit 10 of the base station 1 decodes the received data by the decoding unit 26, and performs an error detection process using a CRC check bit or the like on the decoding result to determine whether the reception was successful. To judge. If the reception is successful, an ACK signal is generated and supplied to the multiplexer 13. If the reception is unsuccessful, a NACK signal is generated and supplied to the multiplexer 13.

In addition, a radio resource for transmitting new data or retransmission data to the mobile station 2 is selected according to ACK / NACK, and together with the reception result (ACK / NACK), the control channel (PDCCH) or the data channel (PDSCH) of FIG. Send via).

The radio resource is selected by specifying a good frequency portion by the SRS and adjusting the bandwidth so that the radio resource has a size required by the BSR.

By the way, the mobile station 2 which has received the reception result and the new allocation of the radio resource again transmits data corresponding to the BSR.

However, this time, the base station 1 determines that the radio resources cannot be allocated to the mobile station 2 due to the above-described circumstances, and transmits a predetermined signal.

The control part 30 of the mobile station 2 which received the predetermined signal regulates transmission of SR, BSR, and SRS.

The release of regulation can use any of the methods described above, and in this example, the transmission of the SRS is transmitted prior to the SR.

After deregulation, a series of processes such as transmission of SR, allocation of radio resource for BSR transmission, transmission of BSR, allocation of radio resource for data transmission, transmission of data and multiple data of BSR are executed.

・ "Flow of processing" (4)

12 shows the flow of resource allocation and data transmission on the uplink (No. 4).

In Fig. 6, the mobile station 2 has already acquired the uplink control channel for transmitting the SR. Here, the mobile station 2 executes from the transmission of the random access signal without acquiring the uplink control channel for the SR transmission. An example is demonstrated.

The other processing can be basically performed similarly to the flow of data transmission (part 1).

First, the control unit 30 of the mobile station 2 generates a preamble as a random access signal transmitted on a random access channel, and transmits it from the transmission processing unit.

The random access channel is a signal to be transmitted when starting communication with the base station 1, and is transmitted in, for example, a transmission area of a random access signal shared with other mobile stations.

 In this example, the random access signal is received by the base station 10, but the base station 1 determines that it is difficult to allocate a radio resource for transmission of the BSR (SR) due to the above-described circumstances, Send the signal.

The control unit 30 of the mobile station 2 executes a regulation process in order to receive a predetermined KS call.

In this case, the target of regulation can be the transmission of the random access signal, the transmission of the SRS, or the like.

The condition for canceling the regulation may use any of the foregoing. However, instead of canceling the transmission restriction of the SR, the transmission restriction of the random access signal is replaced.

In this example, when the release condition for regulation is satisfied, the control unit 30 of the mobile station 2 first transmits a random access signal again.

Then, this time, if the control unit 10 of the base station 1 receives a random access signal, whether the radio resource can be allocated to the mobile station 2 (whether there is room in the radio resource allocation situation) or not. If possible, the radio resource for BSR transmission is selected and the mobile station 2 is notified of the information of the selected radio resource.

The mobile station 2 transmits the BSR using the radio resource in order to receive the allocation of the radio resource for BSR transmission, and receives the radio resource for the data transmission from the base station 1, thereby obtaining data. Send. As in the previous example, data and BSR may be multiplexed and transmitted.

In this example, the SRS is not transmitted even after the transmission restriction of the random access signal is released. The SRS starts transmitting the SRS after the base station 1 responds to the random access signal.

The SRS may start transmission prior to the BSR independently of the transmission of the BSR, and may transmit at predetermined intervals using the portion of A of FIG. 7 (the slot or the like for transmitting the SRS is randomly accessed from the base station 1). Signal response signal (specified as assignment of radio resource for BSR transmission) is assumed to be transmitted at the same time as transmission of BSR.

The SRS is transmitted in the portion D surrounded by the dotted line in Fig. 9, and the portion indicated by DATA is shortened by one symbol. The BSR is transmitted in the part indicated by DATA. Signals such as ACK / NACK may not be transmitted or may be time-multiplexed in the DATA portion and not overlapped with the SRS.

In this example, the base station 1 allocates the radio resource for transmitting the BSR to the mobile station 2 for the random access signal, but allocates the PUCCHi of FIG. 7 to the mobile station 2, 2) may use the PUCCHi to transmit the SR first as shown in FIG.

In addition, when a predetermined signal is not transmitted from the base station 1 even though the random access signal has been transmitted (in the case of the silent), the mobile station 2 does not restrict transmission of the random access signal or the like, but again random access. What is necessary is just to transmit a signal.

・ "Flow of processing" (5)

13 shows the flow of resource allocation and data transmission on the uplink (part 5).

In the previous examples, the base station 1 has transmitted a predetermined signal based on reception of an SR, a BSR, and a random access signal. Here, the base station 1 uses the predetermined signal as a notification signal. Let's transmit.

Fig. 14 shows a structural example (part 2) of a frame used for downlink transmission.

In this frame, a notification channel centered on the boundary portion of the slot is set in the center portion of the frequency band used for transmission, and the data channels 1, k, j, m, and the data channel 1 are placed in the same frequency band. Setting. The control channel includes information capable of specifying transmission frequencies and transmission parameters of the data channels i, j, k, 1 and m, respectively.

The notification channel is a channel for transmitting information for notifying a plurality (all) of mobile stations in a cell constituted by the base station 1, and may transmit radio resource information for transmitting the above random access signal.

In this example, it is assumed that a predetermined signal is included in this notification information.

That is, the control part 10 of the base station 1 produces | generates a predetermined | prescribed signal, and supplies the predetermined | prescribed signal by supplying to the multiple part 13 as a part of notification information.

When the mobile station 2 periodically receives the notification information and receives the predetermined signal as the notification information, the mobile station 2 transmits the SR (or random access signal) and the SRS in spite of the uplink packet data to be transmitted. Regulate.

Thereby, regulatory control can be applied to a plurality of mobile stations at the same time. In addition, a mobile station that has already been allocated a radio resource for data transmission or BSR transmission may not execute the regulation control even when a predetermined signal is received.

Then, if a predetermined signal is not detected by new reception of the notification information (for example, reception in the next notification channel reception period), the control unit 30 of the mobile station 2 cancels the transmission restriction of the SRS. In addition, the transmission restriction of the SR is released, and the SRS and the SR are transmitted respectively. Here, the SRS is periodically transmitted separately from the SR.

The base station 1, which has received the SR, selects the radio resource to be allocated based on the SRS and the like, and transmits the information of the allocated radio resource in the downlink control channel.

Therefore, the control part 30 of the mobile station 2 transmits data in the frequency part to transmit data according to the information of the allocated radio resource.

Of course, as shown in Fig. 6, the base station 1 may first allocate a radio resource for transmitting the BSR and then allocate a radio resource for transmitting the data.

・ "Flow of processing (6)"

Fig. 15 shows the flow of resource allocation and data transmission on the uplink (No. 6).

In this case, a system frame number (SFN) is assigned to the radio frame, and the notification information is transmitted while updating the frame number at regular intervals, so that the mobile station 2 can specify the radio frame number. have.

When the control unit 10 of the base station 1 transmits a predetermined signal, the control unit 10 transmits predetermined timing (for example, timing initiated by SFN13) information together with the mobile station 2 to transmit the predetermined signal. Instructing to carry out the regulation process until.

Therefore, the mobile station 2 restricts the transmission of the SRS and the SR even if there is an uplink packet to be transmitted by the reception of the predetermined signal.

The mobile station 2 then receives the notification information channel again at the timing of the radio frame in which SFN13 is transmitted. In addition, after the predetermined signal, the power supply of the reception processing unit can be turned off until SFN13 arrives. However, when separate reception is necessary such as intermittent reception, the reception is performed.

By the way, when the mobile station 2 receives the radio frame of SFN13 and detects that the notification information is not transmitting a predetermined signal (detecting that radio resource allocation may be made), the SRS and SR are transmitted. The restriction is released, and the SRS and the SR are transmitted. In addition, although SRS may transmit simultaneously with SR, here, SRR is transmitted first.

The base station 1, which has received the SR, selects the radio resource to be allocated based on the SRS and the like, and transmits the information of the allocated radio resource in the downlink control channel.

Therefore, the control part 30 of the mobile station 2 transmits data in the frequency part to transmit data according to the information of the allocated radio resource.

Of course, as shown in Fig. 6, the base station 1 may first allocate a radio resource for transmitting the BSR and then allocate a radio resource for transmitting the data.

In addition, a mobile station that has already been allocated a radio resource for data transmission or BSR transmission may not execute the regulation control even when a predetermined signal is received.

The flow 1-6 of each process demonstrated above can also be used combining them arbitrarily.

1 shows a flow of processing for data transmission from a mobile station to a base station.

2 shows a flow of processing for data transmission from a base station to a mobile station.

3 is a diagram illustrating a flow of uplink resource allocation and data transmission.

4 is a diagram illustrating a configuration of the base station 1.

5 is a diagram showing the configuration of the mobile station 2;

6 is a diagram illustrating a flow of uplink resource allocation and data transmission (part 1).

Fig. 7 is a diagram showing a configuration example of a frame used for uplink transmission (when there is no transmission data).

Fig. 8 is a diagram showing a structural example (part 1) of a frame used for downlink transmission.

Fig. 9 is a diagram showing a configuration example of a radio frame used for uplink transmission (when transmission data is present).

10 is a diagram illustrating a flow of uplink resource allocation and data transmission (part 2).

Fig. 11 is a diagram showing the flow of uplink resource allocation and data transmission (part 3).

Fig. 12 is a diagram showing the flow of resource allocation and data transmission on the uplink (part 4).

Fig. 13 is a diagram showing the flow of resource allocation and data transmission in the uplink (part 5).

Fig. 14 is a diagram showing a structural example (part 2) of a frame used for downlink transmission.

Fig. 15 shows the flow of resource allocation and data transmission on the uplink (part 6).

<Explanation of symbols for the main parts of the drawings>

1: wireless communication device (base station)

2: wireless communication device (mobile station)

10: control unit

11: data processing unit

12: scheduler

13: multiple parts

14: symbol mapping unit

15: multiple parts

16: IFFT processor

17: CP insertion part

18: wireless processing unit

19: DUP (duplexer)

20: wireless processing unit

21: CP deletion unit

22: FFT processing unit

23: equalization processing unit

24: IFFT processing unit

25: demodulator

26: decoder

27: channel quality measurement unit

30: control unit

31: data processing unit

32: multiple part

33: symbol mapping unit

34: multiple part

35: FFT processing unit

36: frequency mapping unit

37: IFFT processing unit

38: CP insertion part

39: wireless processing unit

40: DUP (duplexer)

41: wireless processing unit

42: CP deletion unit

43: FFT processing unit

44: demodulator

45: decoder

Claims (17)

The first radio communication device transmits a signal used to select radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of radio resources from the first radio communication device. Then, based on the signal used for the selection of the radio resource, the radio resource to be allocated is selected from within a predetermined frequency band, the information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication is performed. An apparatus is a control method in a wireless communication system which transmits transmission data using a radio resource specified by the information of said radio resource, And the first radio communication device performs control for regulating the transmission of a signal used for selecting the radio resource to be allocated when a predetermined signal is received from the second radio communication device. The method of claim 1, The signal used for selecting the radio resource is either a pilot signal transmitted using a plurality of frequencies within the predetermined frequency band or a signal indicating a buffer state in the first radio communication device. Control method. The method of claim 1, And the second radio communication device transmits the predetermined signal on the occasion of receiving a signal for requesting allocation of the radio resource. The method of claim 1, The second radio communication device transmits the predetermined signal as notification information. The method of claim 4, wherein The predetermined signal is a signal transmitted in a situation in which radio resource allocation cannot be performed, and the second radio communication device signals a signal informing that the first radio communication device is in a situation in which radio resource allocation can be performed. If received from the control method, characterized in that to release the regulation. The method of claim 4, wherein The predetermined signal is a signal transmitted in a situation in which radio resource allocation cannot be performed, and includes an expected timing at which a situation in which the radio resource allocation cannot be performed changes. The control method is released when the notification information indicating that the radio resource allocation can be performed from the second wireless communication device at the expected timing. The method of claim 1, The signal used for selecting the radio resource is a pilot signal transmitted using a plurality of frequencies within the predetermined frequency band, When the first radio communication device receives a predetermined signal from the second radio communication device, the first radio communication device also controls to control the transmission of the signal for requesting allocation of the radio resource, and performs the transmission of the pilot signal. The regulation is canceled at the same time as the regulation of the transmission of the signal requesting allocation of the radio resource or before the time, or at the same time as the transmission of the report signal of the buffer amount or before the time. Control method characterized in that. The first radio communication device transmits a signal used to select radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of radio resources from the first radio communication device. Then, based on the signal used for the selection of the radio resource, the radio resource to be allocated is selected from within a predetermined frequency band, the information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication is performed. An apparatus is a radio communication apparatus corresponding to the first radio communication apparatus in a radio communication system that transmits transmission data using a radio resource specified by the information of the radio resource. A control unit for controlling to control transmission of a signal used to select the allocated radio resource when a predetermined signal is received from the second radio communication apparatus Wireless communication device comprising a. The first radio communication device transmits a signal used to select radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of radio resources from the first radio communication device. Then, based on the signal used for the selection of the radio resource, the radio resource to be allocated is selected from within a predetermined frequency band, the information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication is performed. An apparatus is a radio communication apparatus corresponding to the second radio communication apparatus in a radio communication system, which transmits transmission data using a radio resource specified by the information of the radio resource. Transmitter for transmitting a predetermined signal to the first wireless communication device And While the first radio communication apparatus controls the transmission of a signal used to select the radio resource to be allocated by the predetermined signal, the radio resource to be allocated is allocated from the first radio communication apparatus. A wireless communication device, characterized in that it does not receive a signal used for selection. The first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of the radio resource from the first radio communication device. Upon reception, the radio resource to be allocated is selected and the information of the selected radio resource is transmitted to the first radio communication device, and the first radio communication device transmits using the radio resource specified by the radio resource information. As a control method in a wireless communication system for transmitting data, The second radio communication device transmits a predetermined signal in accordance with the radio resource allocation situation, And the first radio communication device performs control for restricting transmission of a signal for requesting allocation of the radio resource when a predetermined signal is received from the second radio communication device. The method of claim 10, And the second radio communication device transmits the predetermined signal when there is no newly assignable radio resource. The method of claim 10, The regulation is performed by a time limit determined based on any one time included in a single or a plurality of time candidates. The method of claim 10, The predetermined signal includes timing information for releasing the regulation; And said second radio communication device releases said restriction in accordance with said timing information. The method of claim 10, And the second radio communication device transmits the predetermined signal in response to receiving one of a random access signal and a scheduling request signal. The method of claim 10, The signal for requesting allocation of the radio resource is any one of a random access signal or a scheduling request signal. The first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of the radio resource from the first radio communication device. Upon reception, the radio resource to be allocated is selected, and information on the selected radio resource is transmitted to the first radio communication device, and the first radio communication device transmits using the radio resource specified by the radio resource information. A wireless communication device corresponding to the first wireless communication device in a wireless communication system for transmitting data, comprising: A receiving unit which receives a predetermined signal transmitted from the second radio communication apparatus according to the radio resource allocation situation; A control unit which controls to control a signal for requesting allocation of the radio resource when the reception unit receives the predetermined signal; Wireless communication device comprising a. The first radio communication device transmits a signal for requesting allocation of radio resources to the second radio communication device, and the second radio communication device receives a signal for requesting allocation of the radio resource from the first radio communication device. Upon reception, the radio resource to be allocated is selected, and information on the selected radio resource is transmitted to the first radio communication device, and the first radio communication device transmits using the radio resource specified by the radio resource information. A wireless communication device corresponding to the second wireless communication device in a wireless communication system for transmitting data, comprising: Transmitter for transmitting a predetermined signal according to the radio resource allocation situation And While the first radio communication device having received the predetermined signal is regulating a signal requesting the allocation of the radio resource, the first radio communication device does not receive a signal requesting the radio resource allocation from the radio communication device. Wireless communication device.

Images